Score one for interim coach Ron Rolston’s line shuffling and confidence in Jhonas Enroth. Score a big one for the embattled Buffalo Sabres’ power play, too.

Rolston gave hints Sunday he was going to break up the team’s forward combinations, made good on the promise Tuesday night and got instant results. Moved up to the top line, agitator Steve Ott scored a first-period goal and then banged home the winner on an overtime power play as Buffalo beat the Montreal Canadiens, 3-2, at the Bell Centre.

But there’s no way the Sabres, who were 1-3-3 in their previous seven games, snap their two-game skid without Enroth. The backup goalie who went nearly 16 months without a win made 32 saves and has now posted back-to-back victories in eight days.

“Jhonas was awesome tonight,” Ott said.

Enroth had to be sharp in the final 40 minutes as the Habs outshot Buffalo, 26-8, in that span and dominated play in the Sabres’ zone. But the Sabres kept battling, as evidenced by the fact they blocked 23 shots in the game.

Buffalo had a 2-0 lead through two periods before Max Pacioretty scored at 7:04 of the third and the Habs kept bringing the heat until an unguarded Colby Armstrong slid a backhander by Enroth from the doorstep with 3:51 left. That brought Montreal even and sparked bedlam in the roaring sellout crowd of 21,273.

Enroth’s biggest save came with 15.9 seconds left, when he quickly slid to his left to rob Brian Gionta and keep the game tied. It preserved one point for the Sabres and gave them the chance for two.

“Huge,” Rolston said. “Just huge.”